Injector



(No Model.)

. W. B. MACK.

INJECTOR.

No. 301,735. tented July 8, 1884 WI'Jbz/e/JJ es. Ira/g e/n/tor W 7' WWj N. mcn's pmmm n w. Wnhinmn. ac.

UNITED STATES ATENT rricn.

WILLIAM B. MACK, OF BOSTON, MASSACHUSETTS.

INJECTOR.

SPECIFICATION forming part of Letters Patent No. 301,735, dated July 8, 1884.

Application filed January 19, 1884. (No model.)

To aZZ whomit may concern.-

Be it known that I, WILLIAM B. Manic, of Boston, in the county of Suffolk and State of of Massachusetts, have invented certain 1mprovements in Injectors, of which the following is a specification.

This invention has for its object, first, to provide an attachment whereby an ordinary injector may be enabled to raisewater from a considerable depth with a moderately-low pressure of steam.

This invention also has for its object to provide an improved form of water-valve for an injector,whereby the water supplied to the injcctor will be condensed into a solid stream comparatively free from air.

The invention consists, first, in the combination, with an injector, of an ejector so arranged that the passage of steam through it will exhaust the air as far as possible from the pipe through which the water enters the intjector and from the spaces in the injector through which the water passes, and thus cause the water to rise and fillsaid pipe and spaces before steam is admitted to the injector, and a valve which automatically shuts off all communication between the ejector and the waterspaces in the injector when steam is shut off from the ejector, thereby preventing ingress or back action of air into the water-space of the injector, and holding the water therein.

The invention consists, secondly, in providing the water-valve with an extension or breast against which the entering water impinges, and by which the water is caused to pass without agitation through the opening between the valve and its seat, all of which I will now proceed to describe.

Of the accompanying drawings, forming a part of this specification, Figure 1 represents a longitudinal central section of an injector provided with my improved valve. Figs. 2 and 3 represent modifications in the form of the valve. Fig. ;-i represents the ordinary form of valve.

The injector A (shown by way of illustration of my invention) is of the class shown in Letters Patent of the United States granted to WV. B. and J. D. Mack, Augustl, 1882,1lo. 262,070, and has the steam-valve a, combining-cone b, wateninlet c, overfiowchamber d, overflowpipe 0, and delivering-cone f, substantiallyas shown in said patent.

B represents the ejector,which consists of a tubular body, 2, communicating at its rear end with thesteampipe g, which supplies steam,

to the injector,(or with an independent steampipe, if preferred,) and having at its front end a steam-cone, 3, surrounded by a chamber or space, 4, which is extended into a deliveringnozzle, 5, opening into the atmosphere. The space or chamber 4 surrounding the steamcone communicates through a vertical pipe, 6, with the overflow-chamber (Z of the inject or, so that when steam under sufficient pressure is allowed to pass through and out of the ejector, in the direction indicated by the arrow, it will draw air powerfully through the .pipe 6 from the overflow-chamber and the spaces communicating therewith, including the space around the combining-cone and in the water-pipe c. This action of the ejector takes place before steam is allowed to pass through the injector, the valve to of the latter being closed. The partial vacuum thus produced in the above-named spaces in the injector causes the water to rise from a considerable depth and fill said spaces, this fact be iug indicated by the drippings from the over flow-pipc 8, caused by the downward pressure of the water on the upwardly-closing springvalve 1 of said overflow-pipe. Steam may then be shut off from the ejector by closing the valve 7 at the rear end thereof. The mo ment this is done a downwardly-closing valve, 8, in the pipe 6 falls upon its seat by gravitation, aided by atmospheric pressure from above. Air is thus prevented from entering the injector through the ejector and the pipe 6, and the water raised into the injector by the action of the ejector is prevented from falling back through the water-supply pipe. The injector may now be put in operation by opening thevalve a, the steam thus admitted acting on the water in the usual manner, and causing a continuous flow of water to the boiler or other receptacle to be supplied. 1 have found by practical tests that by the described preliminary actiou of the ejector the injector is enabled to lift water more than seventeen feet with steam at a pressure of fortyfive pounds,while without this assistance an injector of the same construction cannot lift water more than six or eight feet. The steam passing'through the injector not having free vent as in the ejector, cannot acquire sufficient force to exhaust the air from water-supply pipes extending to a considerable depth. I attribute the success of the ejector attachment, therefore, first, to the ing the water in the pipes far above the level from which it is drawn.

1) represents my improved valve, and w the casing thereof. I provide the valve '0 with a projection, 1), extending through the opening in the valveseat y, and presenting to the in- ,coming water a salient curved surface of such form that the water will not be agitated and converted into spray, or become mixed with air-bnbbles in passing between the raised valve and its seat. The projection 22 is preferably conical and formed at a slight angle with the portion of the valve that bears upon the seat when closed, as shown in Fig. 1, although, if preferred, the projection and valve may be in the form of a true cone, as shown in Fig. 3, or may be rounded, as Shown in Fig. 2. Heretofore thevalve has been flat-,as shown in Fig. 4-, on the side against which the water strikes. Said form of valve causes the water to turn abruptly and become considerably agitated in passing throughthe valve-seat,so that the water is in a frothy condition or contains a considerable quantity of air when it enters the injector. The presence of air-bubbles in the water within the injector prevents the injector from throwing a solid stream of water, and is therefore objectionable. By the provision of a salient surface or projection on the valve to meet the incoming water, as shown, much of the agitation of the water heretofore experienced is obviated, and the water enters the injector in a less frothy or aerated condition than heretofore.

I claimv 1. An injector of the'class described, pro- Vided with an ejector communicating with the water-spaces in the injector and adapted to exhaust air therefrom, and a valve whereby communication between the ejector and injector is automatically cut off when the ejector ceases to act, as set forth.

2. In an injector,a water-valve having a salient extension, substantially as and for the purpose specified.

In testimony whereof I have signed my name to this specification, in the presence of two subscribing witnesses, this 15th dayof January, 1884.

IVILLIAM B. MACK. I/Vitnesses:

O. F. BROWN, A. L. WVrIrrn. 

